Trip-valve device.



E. R. HILL.

TRP VALVE DEVICE.

APPLIGAMON FILED mi 1o, 1911.

Patented Mar. 30;.1915.

2 SHEETS-SHEET 1.

E. Ei HDSL.

TBI? VALVE DBVOI-.

rumanos HLED HAY 1o, 1911.

2 SHEETS-SHEET 2.

Eatented Mar. 3G, 1915.

INVENTOR @M 7PM MZK YITHESSIS EST 310 W JANE HELL,

GF EAST BANGE, NEW JERSEY, ASSIGNOR TO THE WESTING- .EGUSE BRKE CQMPNY, OF PITTSBURGH, PENNSYLVANIA, A CORPORATON 'BRIE-VALVE DEVICE.

application filed May 10. 1911.

at East Orange, in the county of Essex and State of New Jersey, have invented new and useful improvements in Trip-Valve Devices, of which the following is a specification.

This invention relates to trip valve devices for use in controlling trains automatically and is adapted to be operated by a trip mechanism located along the track to vent air from the train brake pipe to apply brakes, and shut ed thesupply of motive duid from the motors when the vehicle'runs past a signal set at danger:

One of the objects of my invention is to provide an improved trip valve .device of this character, which shall be of simple and durable construction and adapted to hold the vent valve open until the trainpipe pressure has fallen to a pred termined degree. A

Another'object is i `lize the air thus vented from the train ie i'or operating a device for closing; the throttle valve or other motive power controller.

ils shown in the accompanying drawing, Figure l is a sectional view oi' one form of improved trip valve device;'l`ig. .a similar view showing al slightly modified Y Instruction; Fig, 3, a view, mostly in section, of a throttle valve closing device operated the air vented from the train pipe by tht trip valve; and, Fig. Li, a sectional vie-w ordainediied form of throttle closing device."

As shown in Fig. l, my improved trip valve device comprises a casing having connection, l0, 'for communication with the train brake pipe and containing a valve, t", which, as shown, is of the slide valve type, and `is operated by a pin, 4, extending throiigh a slot in the valve seat'and connected to the main stem 5 having the strilzing head, 6. The stem is provided with piston head, 7, having a snug fit in its cylinder and subject to the adjustable spring, 8,

which tends to hold the stem and valve in the normal closed position. rlhe cylinder space above the piston, 7 communicates with the atmosphere through a. small port 4 so that the air in said chamber acts as a cushion to the upward movement of the stein, l5.,

Specification of Letters Patent.

has diminished to a Patented Mar. 30. Il 91 Serial No. 626,321.

l/Vhen the stom is raised by the trip mechanism along the track, the piston is forced upward, compressing the spring, 8, and opening the vent valve, 9. As the air under pressure from the train pipe then Hows out through the escape pipe, 11, the pressure which builds up on the lower side of piston, 7, is suilicient to hold the same raised with the VIH'alve openuntil the train pipe pressure predetermined degree 8, overcomes the pres- 7, and the valve is then at which the spring, sure under piston,

...returned to closed position. 1n this way the brakes are `au.mmatically applied and the train brought to a stop.

In the construction shown in Fig 2, the vent valve 9a is shown as of the puppet type, mounted directly upon the stem, 5, but the operation is substantially the same as above described. he piston, 7 ,maybe normally located below the discharge outlet in order to be assisted in the upward movement by the air iiowing from the train pipe through the train pipe and passage, 10a. If desired, a diaphragm, lla, having a restricted opening may be located at the discharge outlet for causing the pressure'to build up upon piston, 7.

According to another feature of my improvement, the discharged from the train pipe through the rent valve is utilized for closing the throttle valve, or cutting oi the supply of iuid to the motor propelling the vehicle, and one form of such mechanism is shown in Fig. 3, in which the supply of steam or other fluid to the motor is controlled by a valve 23, having a stem, 22, and

a spring,'25, for closing the valve. Thevalve is normally held open by a latch, 20, engaging a collar, 21, on the stem, 22, but said latch is adapted to be released by the piston, 18, when fluid -under pressure is admitted to the same, therebyy compressing spring, 19, and allowing the spring, 25, to close the valve, 23. The valve may then be opened and reset by the handle, 24.

In order to control the pressure operated latch by the air discharged (from the train pipe through the ventvalvm/a vane or l'lap valvefl2; may beVY pivotallymounted at the end o f the discharged pipe, 11, in such a manner that thev air in discharging turns the vane and lever, 13, to vactuate small valvesv and 1fwhich control the supply of iiuid underpressure from pipe, 17, through pipe 2G, to thcpis'ton, 18, andpits release y therefrom to the atmosphere. A.The end of the discharge pipe may be covered by a perforated screen, 14. When the train pipe vent valve is opened, and the airis discharged through pipe, 11, against the vane, 12, the same moves to close the exhaust valve, 15, and open supply valve, 16, whereupon the piston, 18is actuated by the pressure to re.-

' lease. the latch'andpermit the closing of the 15fyfinain supply 235, thereby bringing the trainto a sudden stop. v

According to the construction shown 'in Fig. el, the throttle is in the `form of a pis` ton lvalve, 33, having a reduced portion, 34,-

and being continuously exposed at one end l to the pressure in chamber, 32, which communi'cates with thesource of supply. The pressure in chamber, 31, at the opposite end of the piston valve is controlled by a small valve, 28, having a stem, 40, connected to piston, '39, located in a chamber communieating with the dischargepipe, 11. Pressure 'from the source of'supply admitted through the passage, 29, normally holds the valve," 28, with the exhaust, 36, closed and communicates through port, 30, with the chamber, 31. As a stem or rod, 38, is connected to theopposite end of the piston valve,- the area exposed to the pressure in chamber, 31,is

opens exhaust port, 36, whereupon the pres-- sure;escap es from chamber 31, and the pres- I. sure in chamber 32, at the opposite end of the piston valve, 33, shifts the same to nary trip c5 theniotorman at the. saineV time that the trip operated by a trip mechanism along the'vi closed pesitiom andcuts off the supply of.

steam or other lui to the motors. After the pressure has escaped from thetrain pipe, the valve', 28, may -be reset by the' hand 1ever, 35, and, if desired, the piston valve, 33, may. also be manually adjustedby means of the rod connection, 3 8` It;v Will-` be 4apparent that any suitable form of. rent va ve device, such as an ordicockjil, shown in Fig. 3, may be employe in connection'with the feature of my improvement relating to the use of the air vented from lthe train pipe for contro1 lingth'e cuttiny 6ft-of the sup ly of motive .operate valve is operated, this may be conveniently accomplishedl by attaching a whistle 41 to the pipe 26 so that the fluid under pressure will operate tousound the alarm when the 'valve 16 is opened-by the air vente'diromy the train pipe.- l y,

yWhile I have described more or less in detail, certain specific devices for accomplish` ing the desired results, it will be understood that my invention is not limited to any particular form of construction as it is apparent that various other modifications of uid pressure means governedbythe discharge of air ,from the train pipe through the vent' valve maybe designed without departing from the spirit and scope'of my invention.-

Having now described my invention, what I claim as new and desire to secure by Letters Patent, is: v

1."Inv a trip ,valve device for air brakes, the combination with a vent valve for ,controlling the discharge from the train pipe, and a connection adapted to be operated by a trip mechanism alongthe track for openi I ing said valve, of means governed by the or maintaining the same open a certain length of time.

2. In a trip valve devicel for air brakes, the combination with a vent valve for con'- ressure of 'air vented through said valve z trollingV the discharge from the train pipe,

a trip mechanism along the track for open ing said valve, of a movable abutment subject to the pressure of the air vented through and a connection adapted to be operated by l said valve vfor holding the same open until' the train pipe pressure has diminished a predetermined amount. L

3. In a trip valve device for air brakes, the combination with a vent valve for controlling the discharge from the train pipe,

and a connection adapted to be operated by a trip mechanism along the track for open ing said valve, of a movable abutment con-` track for opening said valve, of"a power controller having fluid pressure mechanism for controlling t vent valve for fluid ressure mechanism.

ressure of the air vented through valve devicefor air brahea by a, tripV mechanism' 'along the A A1205 e closing of the same, and; a movable abutment operated by the air dti'v v charged froml the train pipe through the" governing the action4 OsaQHk ius 5. n a trip valve device for airJ the combination with a train pipe, averi;

fluid.' If it is esired to soun an alarm inssxvalve for controllingthe discharge from the -v the locomotivecab or within the hearing of train pipe, and a connection adapted to be track for opening said valve, of a throttle In testimony whereof I have hereunto set valve having a fluid pressure device for conmy hand. trolling the closing of said throttle valve, ERNEST ROWLAND HILL. and means operated by the air discharged Witnesses:

5 from the train pipe through the vent valve WILLIAM J. HAWSO,

-for governing the action oisaid device. EDMUND J. BELL. 

